SI (Spectrum Inversion)-based nonlinear fiber damage compensation method and device in OFDM system

A nonlinear damage, O-OFDM technology, applied in the field of optical fiber nonlinear damage compensation, can solve the problems of system nonlinear tolerance reduction, increased signal DAC/ADC complexity, system performance degradation, etc.

Inactive Publication Date: 2010-09-29
BEIJING UNIV OF POSTS & TELECOMM
View PDF4 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, because the frequency difference between the subcarriers of the optical OFDM system is very small, this makes the walk-off between subcarriers very weak, and it is easy to meet the conditions of nonlinear interaction of optical fibers and form crosstalk; the subcarrier spacing is generally tens of MHz , unlike WDM systems, the data correlation between subcarriers will also affect each other through cross-phase modulation (XPM) and four-wave mixing (FWM) nonlinear effects
Secondly, since the OFDM signal is overlapped by a series of sub-channel signals,

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • SI (Spectrum Inversion)-based nonlinear fiber damage compensation method and device in OFDM system
  • SI (Spectrum Inversion)-based nonlinear fiber damage compensation method and device in OFDM system
  • SI (Spectrum Inversion)-based nonlinear fiber damage compensation method and device in OFDM system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] The embodiment of the present invention is applicable to a 40Gbit / s coherent OFDM (CO-OFDM) modulation and demodulation system.

[0022] figure 1 It is a schematic structural diagram of a 40Gbit / s CO-OFDM system using the compensation device of the present invention.

[0023] The 40Gbit / s binary data sequence is first modulated by QPSK, and then data zero-padding (Zero-Padding) is performed to form a frequency-domain guard interval and pi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to SI (Spectrum Inversion)-based nonlinear fiber damage compensation method and device in an O-OFDM (Optical-Orthogonal Frequency Division Multiplexing) system, belonging to the field of optical communication and applied to the O-OFDM system for nonlinear fiber damage compensation. The whole compensation module is arranged in front of a receiver of the O-OFDM system and comprises an SI unit and an HNLF (Highly Non-Linear Fiber) which has a certain length and is arranged behind the SI unit, wherein SI is realized by an SOA (Semiconductor Optical Amplifier) based on FWM (Four Wave Mixing) effect.

Description

technical field [0001] The design of the present invention relates to a compensation method and device for optical fiber nonlinear damage of an optical orthogonal frequency division multiplexing (Optical Orthogonal Frequency Division Multiplexing, O-OFDM) system based on spectrum inversion (Spectrum Inversion, SI), and belongs to the field of optical communication , applied to O-OFDM system for nonlinear compensation. Background technique [0002] With the continuous improvement of social informatization and the continuous maturity and development of some new data services in the network (such as: P2P in the network, IPTV, video on demand (VOD), etc.), the demand for information transmission bandwidth in human society is astonishing. With the rapid growth of speed, ultra-high speed and ultra-large capacity have become the main goals pursued by information transmission. Continuing to expand capacity through WDM technology will result in many limiting factors: First, continui...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B10/12H04L27/26H04B10/2543
Inventor 纪越峰刘学君乔耀军
Owner BEIJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap